Simultaneous equations: nine of them, involving nine unknowns.
She had done her duty by the lunch and she was not going to mingle in this crowd of unknowns.
“It will teach Lakeporters a good lesson,” put 57 in one of the unknowns.
And no unknowns have been in close contact with any of the team.
Each environment presents its own sets of conditions and unknowns.
And above ...